1. Vitamin D Related/Nuclear Receptor
    Metabolic Enzyme/Protease
  2. Estrogen Receptor/ERR
    Endogenous Metabolite
  3. Estriol

Estriol  (Synonyms: Oestriol)

Cat. No.: HY-B0412 Purity: 99.27%
COA Handling Instructions
Top Publications Citing Use of Products

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  • Biological Activity

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Estriol is an antagonist of the G-protein coupled estrogen receptor in estrogen receptor-negative breast cancer cells. Target: Estrogen Receptor/ERR A recent study shows that estrogen (estrone, estradiol, and estriol) inhibits Alzheimer's disease-associated low-order Aβ oligomer formation, and among them, estriol shows the strongest in vitro activity [1]. In mPTEN+/- mice, estriol treatments resulted in a 187.54% gain in the relative ratio of uterine wet weight to body weight; estriol also increases the ratio to 176.88% in wild-type mice [2]. Estriol treatment (20 mg/kg ip), in vivo, sensitizes Kupffer cells to LPS via mechanisms dependent on an increase in CD14 by elevated portal blood endotoxin caused by increased gut permeability in rats; while one-half of the rats given estriol intraperitoneally 24 hours before an injection of a sublethal dose of LPS (5 mg/kg) died within 24 hours [3].

IC50 & Target

Human Endogenous Metabolite


Clinical Trial
Molecular Weight







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Structure Classification

Room temperature in continental US; may vary elsewhere.

Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 250 mg/mL (866.91 mM; Need ultrasonic)

H2O : 1 mg/mL (3.47 mM; ultrasonic and warming and heat to 80°C)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 3.4676 mL 17.3382 mL 34.6765 mL
5 mM 0.6935 mL 3.4676 mL 6.9353 mL
10 mM 0.3468 mL 1.7338 mL 3.4676 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 2.08 mg/mL (7.21 mM); Clear solution

  • 2.

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in saline)

    Solubility: ≥ 2.08 mg/mL (7.21 mM); Clear solution

  • 3.

    Add each solvent one by one:  10% DMSO    90% corn oil

    Solubility: ≥ 2.08 mg/mL (7.21 mM); Clear solution

*All of the co-solvents are available by MCE.
Purity & Documentation

Purity: 99.27%

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Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Molarity Calculator

  • Dilution Calculator

The molarity calculator equation

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

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